Declined Volga gambit

Declined Volga gambit starts at the following moves order 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3. This is original gambit which is not refuted by White and thus deserves being applied in the most important games. As usually, the lesson is being led by Andre Martin who will explain this gambit to you.